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Solar Power Cost
Fuel Savings from Solar DHW
Question:
How does one go about calculating the potential fuel savings from installation of a solar DHW system? At present, we have a propane-fired furnace, hydronic heat, and a separate storage tank for DHW heated off the same furnace. Maine has recently implemented a credit for solar DHW, even when off grid, [...]
Heat loss along 15mm & 22mm Cu pipe
Question:
My question concerns the insulated return pipe from a solar collector. I intend to run copper pipe to the hot water tank/heat exchanger but can’t decide what size pipe to use (the anticipated hot water flow will be perhaps 50 lt/hr). Comparing a 5m run of 15mm against 22mm [...]
How much energy in a 10,000 gal gravity battery?
Question:
I dig a big hole, put in a 10,000 gal plastic tank, pile the dirt from the hole up in a pile and put a second tank on the hill. Lets say I have a 10′ hill and a 10′ tank… that’s a 20′ head to the 1st tank in the ground… How [...]
Portawattz problem..
Question:
I have been using a 1750 watt Portawattz inverter in the garage. Yesterday, with only a radio plugged into it, the unit quit working. The overload light is on and won’t go out. I’ve tried disconnecting it from the batteries and reconnecting. No change. It will turn off via the [...]
Attic to heat the house????
Question:
I was just thinking of painting my metal roof black. I was thinking that the sun would warm up the attic alot during the day than at night I could use a small fan to pull the heat down into the living space. Any ideas on what I could put up there [...]
Interesting Product
Question:
> >> www.power-spar.com >I just attended an information meeting at their plant in Ottawa this >morning, as a matter of fact! Very interesting technology, a very >interesting company. > Looks interesting, are they actually available, and any idea on > pricing?
William, yes, they are available very shortly; Menova Engineering of [...]
tank -> tankless
Question:
Folks the subject of solar -> unpowered tank -> tankless water heater has been discussed here several times — please humor me if I ask one question: if I want to switch to a passive unpowered tank which dumps to a tankless water heater, does anyone know a brand of massively [...]
Most efficient use of vetable oil ?
Question:
Here’s a simple question looking for a guru answer.. I have an almost endless supply of used cooking oil.. Ignoring the fact that I could use it in the most unefficient way possible to achive my goal, what is likely to be the most efficient way to convert it to a [...]
TELESCOPE on a cruise?
Question:
my wife thinks this is a dumb question but has anyone taken their scope on a cruise or do any of the lines offer a stargazing night with provided equipment? mark
Response:
>my wife thinks this is a dumb question but has anyone taken their scope on a >cruise or do any [...]
Who Will Stand Up for the Kids
Question:
The amount of kid bashing that appears on this board is truly saddening. Aren’t there any of you, who like me, enjoy seeing some children on cruise ships? Or are you all really that OLD? Howard – who thinks it’s about time to speak out on behalf of the children.
Response:
I [...]